The actress - best known for her role as Ellie Bartowski in the TV show 'Chuck' - has been cast in Warner Bros.' new dramedy in the role of Downey's soon-to-be ex-wife, according to The Hollywood Reporter.

The film centres on a high-powered attorney (Downey) who returns to his hometown for his mother's funeral only to discover that his father - who is the town's federal judge - is suspected of her murder.